On Mon, 24 Jun 2019 16:56:45 +0900,
YAMAMOTO Mitsuharu wrote:
> 
> An alternative way would be to use rsvg_handle_render_cairo, which is
> recommended by librsvg, and let it blend with the background color.
> 
> Patch attached.  Note that this does not require --with-cairo.
> Raising the required version of librsvg to 2.14 is not a problem, as
> we are already using rsvg_handle_get_dimensions that requires that
> version.  Is Windows librsvg DLL compiled with libcairo?

Sorry, wrong patch.  Please try this instead.

				     YAMAMOTO Mitsuharu
				mituharu@math.s.chiba-u.ac.jp